Birth prevalence of autism spectrum disorders in the San Francisco Bay area by demographic and ascertainment source characteristics

J Autism Dev Disord. 2011 Oct;41(10):1362-72. doi: 10.1007/s10803-010-1160-2.

Abstract

Using standardized methods for multi-source surveillance, we calculated the prevalence of autism spectrum disorders (ASD) among children born in a racially diverse region in 1994 or 1996 as 4.7/1000 live births. Children with ASD before age 9 were identified through chart abstraction at health-related sources; three-quarters were being served by the state-wide Department of Developmental Services. In adjusted models, we found a male:female ratio of 6:1, a doubling of ASD prevalence among children of older mothers (40+), and lower prevalence with lower paternal education. Children of Black or Hispanic mothers had lower prevalence than those of White, non-Hispanic mothers, but these differences were attenuated after adjustment. Prevalence in children of Asian mothers was similar to Whites. Potential under-counting is discussed.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Age Factors
  • Child
  • Child Development Disorders, Pervasive / epidemiology*
  • Educational Status
  • Ethnic Groups
  • Female
  • Humans
  • Infant
  • Male
  • Population Surveillance
  • Prevalence
  • San Francisco / epidemiology